Mvr. Rao et T. Shripathi, PHOTOELECTRON SPECTROSCOPIC STUDY OF X-RAY-INDUCED REDUCTION OF CEO2, Journal of electron spectroscopy and related phenomena, 87(2), 1997, pp. 121-126
XPS technique is used to study the modification induced in CeO2 on exp
osure to Al K-alpha X-rays. A study of Ce (3d) and O (Is) spectra of s
intered and unsintered pellets of ceria with X-ray exposure time is ca
rried out to investigate the effect of hydroxyl species on X-ray induc
ed reduction of CeO2. After prolonged exposure to X-rays, a colour cha
nge is observed on the sample surface of the unsintered pellet. Result
s show that the reduction of ceria to sub-stoichiometric oxides occurs
at a faster rate in the unsintered pellet on X-ray irradiation. (C) 1
997 Elsevier Science B.V.